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Posted by hallerb@aol.com on June 7, 2006, 10:03 pm
Mark wrote:
> The only valid reason I would say for having a cap is to keep rodents and
> other varmints from building a nest in your chimney or living room for that
> matter. If that isn't a concern, and the amount of rain or snow that falls
> in isn't a worry to you then you are probably right - the aren't necessary.
>
> As for changing the draft of the chimney, if they are sized properly that
> should be a minimum concern. And if by "improve heat loss problem" you mean
> reduce the heat loss - likewise, there should be minimum effect on the air
> flow. Use a good damper when not burning to prevent heat loss.
>
>
> >I have heard good and bad things about chimney caps.
> >
> > What opinions are there about them, the general idea being to keep rain
> > and weather out of the chimney.
> >
> > I have heard that they can alter the draft of the fireplace to make it
> > hard to vent a fire.
> > I've heard they aren't even necessary
> > I've heard they can improve heat loss problems.
> >
> > Those are just a smattering of takes on the matter. I'd be inclined to
> > believe they aren't even necessary but I don't have sufficient experience
> > to say yes or no.
> >
If your talking of a normal fireplace a good option is a top mounted
damper it seals the top unless you have actual fire going, chan from
roof goes to damper contro at fireplace
obviously this cant be used for gas fiored appliances like a furnace
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